From Sanskritआर्य (ā́rya, “noble" or "noble one”), from Proto-Indo-Iranian*arya-, the original Indo-Iranian autonym. Borrowed into English in the 19th century, at first as a term for the Indo-Iranian languages, and later partly extended to the Indo-European languages and peoples following a theory by Friedrich Schlegel that connected the Indo-Iranian words arya / ā́rya with German Ehre (“honor”) and some older Germanic names, thus assuming that it was the original Indo-European autonym meaning "the honorable people". The original meaning of the Indo-Iranian autonym and its possible Indo-European origin/cognates are disputed (see the Wikipedia article for further details).

Same Proto-Indo-Iranian root is the ultimate source of the country name Iran.

This short sketch of the changes that take place among those races that are only the depositories of a culture also furnishes a picture of the development and the activity and the disappearance of those who are the true founders of culture on this earth, namely the Aryans themselves.

Cal tried to think of words that would convey Wolfgang Stahl to the ears and hands of a woman who’d never seen him and never, until now, had to imagine him.

[…]

‘Why not . . . why not think of your chap as a type? Tell me what type you’d sort of put him into.’

‘Sort of?’

‘You know . . . roughly.’

‘He’s an Aryan.’

‘Ah, one of those, eh? Odd when you think about it. I mean. How did they arrive at blue-eyed blonds as a racial type? Hitler’s short and dark and looks like Charlie Chaplin. Goebbels is short and ugly and looks like a rat. And as for Goering – well is that what Billy Bunter grew up to be?’

We have seen that when the Goths first entered Roman territory they were driven on by a vast migration of the Asiatic Huns. These wild and hideous tribes then […] appeared upon the Rhine, and in enormous numbers penetrated Gaul. No people had yet understood them, none had even checked their career. The white races seemed helpless against this "yellow peril", this "Scourge of God", as Attila was called. Goths and Romans and all the varied tribes which were ranging in perturbed whirl through unhappy Gaul laid aside their lesser enmities and met in common cause against this terrible invader. The battle of Châlons, 451, was the most tremendous struggle in which Turanian was ever matched against Aryan, the one huge bid of the stagnant, unprogressive races, for earth’s mastery.

1892, Charles Morris, The Aryan Race: Its Origins and Its Achievements

[The] Caucasian race includes two sub-races, — the Xantho-chroic and Melanochroic of Huxley. The seat of this race is Europe, northern Africa, and southwestern Asia, its linguistic division being into Aryans, Semites, and Hamites.

The surest principle of classification is based on language, but the results must be tested by a study of the physical characteristics of the various races. According to this method of classification, the races of the world may be divided as follows: Aryan, Semitic, Hamitic, Turanian, Negroid. The name Caucasian is generally applied to the first three divisions, — Aryans, Semites, and Hamites. Aryan. — This includes the ancient Hindus […] the Persians, Greeks, Italians, Celts, Teutons, and Slavs.

In popular conception, the Aryan racial type is marked by having blond hair and blue eyes. These are not criteria of any of the technical racial definitions.

Using the technical meanings of the term ‘Aryan’ (Indo-Iranian, Indo-European, Proto-Indo-European, or a subdivision of the Caucasian race) could be misleading and dangerous, as the Nazi and neo-Nazi ideological usages, with their connotations, are the only widely understood meanings of the term in modern English.

Neo-Nazi users generally do not intend the term to be pejorative, however, it can be taken as such outside of the neo-Nazi community, because of the term’s heavy use by and association with the Nazis; the implication is that non-Aryans are inferior. The word is highly-charged, because this thinking is widely considered to have lead to the Holocaust.

Due to the fact that the racial senses of the term are, outside of academic contexts and historical or ethnographic discussions, used primarily by racists of Caucasian ethnicity, the term is sometimes used by non-Nazi speakers as a euphemism for ‘White racist’ (see the talk page for an example scenario).

Today, the term ‘Aryan’ is used primarily by neo-Nazis and white supremacists, or in discussing the ideology and racial theories of Nazism, a mid-twentieth-century racist political movement that considered Aryans (in the first sense) to be the master race, neo-Nazism, and other white supremacist movements and organizations. The term is therefore strongly associated with such ideologies, to the point that it is sometimes euphemistically used to refer to or describe them. Because of this, and because the term carries a strong emotional charge, the technical senses are perhaps best avoided outside of academic contexts where they are certain to be understood, and the racial senses connected with Nazism are perhaps best avoided altogether.

Look at the ravages from which our people are suffering daily as a result of being contaminated with Jewish blood. Bear in mind the fact that this poisonous contamination can be eliminated from the national body only after centuries, or perhaps never. Think further of how the process of racial decomposition is debasing and in some cases even destroying the fundamental Aryan qualities of our German people, so that our cultural creativeness as a nation is gradually becoming impotent and we are running the danger, at least in our great cities, of falling to the level where Southern Italy is to-day.

1872-79: John Beames, A Comparative Grammar of the Modern Aryan Languages of India: to wit, Hindi, Panjabi, Sindhi, Gujarati, Marathi, Oriya and Bangall

[W]ith all due deference to the opinions of scholars, it may be urged that much of this elaborate development arose in an age when the speech of the people had wandered very far away from the classical type. Even if it were not so, even if there ever were a time when the Aryan peasant used poly-syllabic desideratives, and was familiar with multiform aorists, it is clear that he began to satisfy himself with a simpler system at a very distant epoch, for the range of forms in Pali and the other Prakrits is far narrower than in classical Sanskrit.

Who were these Teutons? Rome knew them only vaguely as wild tribes dwelling in the gloom of the great forest wilderness. In reality they were but the vanguard of vast races of human beings who through ages had been slowly populating all Eastern Europe and Northern Asia. Beyond the Teutons were other Aryans, the Slavs. Beyond these were vague non-Aryan races like the Huns. […]

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